A cosbobatioh x



- .Dec. 21 1926.

. R. S. SANFORD BRAKE Filed Nov. 2 1925 in H62 INVENTOR ROY S. 5ANFQRD ATTORNEY l ROY s. sAuronn, or sonar-i Bnn or onroaeo, ELL

1 Application filed November rivers 2. GOR'EOPJATIOEJ 'QF ILLINOIS.

BRAKE.

This invention relates to external contracting brakes, and is illustrated as embodied in a brake for the road wheel oi an automobile. An object of to lmprovc the etliciency oi: brak type by substituting for the new band a plurality of shoes of novel arrangement.

the invention. is

es of this .il flexible form and An important nature relates to over apping the shoes by anchoring one tween the ends of another for or making the one shoe forked at end and the end of the adarranging itto straddle jacent shoe.

shoe bemple by 7 Other features relate to an arrangement for insuring successive operation of a pair of connected shoes, to novel anchor arrangement, and to other new combinations of parts and desi able pa cnlar tions which will be apparei lowing description of bodiment shown in the ing. in which:

Fig. 1 is a vertical brake. just inside the wheel, brake shoes in side elevation;

Fig. 2 is a shoe ends and section through the con struc from the one illustrative emaccompanying drawsection on the line 2-2 of 1, showing the anchorlng of the overlapplng of Fig. 1, showing the connection between two of the shoes, and the spring sures successive operation of the s In the arrangement illustrated.

which in hoes.

the brake includes a drum 10. within which may be arranged,

if desired, an internal eraanding brake 12, and at the open side of which is arranged a. backing port 14.

plate or o ther sup- At its lower side, a part ofsupport 14 extends beyond the drum, and carries a pair of anchors 16 and 18, which may if desired pass through reinforcing arms 20 carried directly CTI the axle. relatively large opening 22111 a ce Anchor 16 passes through a ntral shoe 24. and serves as a pivot anchor for arms 26 projecting from the channel-shaped end of a shoe 28 which 1s T-shaped in cross-section throughout the Anchor '18, which serves as a piv end of shoe the end of shoe 28, passes through large openings .30 in arms 26.

Shoe 24 is illustrated as being in cross section throughout its le greater part 01 its length.

ot for the 24C straddled or overlapped by relatively T-shaped ngth, and

2, 1925. Serial No. 56,274.

at its unanchored end is pivotally connected by a pin 82 to arms 34 forming a fork at the end of a T-section unanchored or servo shoe 36. One arm 3% of shoe 36 has a lug 38 projecting laterally beyond backing plate 14, and carrying a headed pin 10 projecting through a bracket 42 secured to. the backing plate. A spring 44 sleeved on pin 10 serves as means yieldingly urging the connected ends of shoes 86 and 24 away from the drum, and insuring that shoe 2% vill not engage the drum until shoe 36 turns with the drum (counter-clockwise in Fig. 1, the direction of movement of the drum when the vehicle is moving forward) and overcomes the spring.

The brake is applied by suitable means rocking a lever 46 pivoter at 48 to the end of shoe 28. and at 50 to the end of a link 52 passing through a lug 54-. on the end of shoe 36 and provided with a threaded adjustable stop engaging the lug. A spring 58 sleeved on link 52 is confined between lug 5e and a fixed bracket 69 secured to the backing plateand hav' 1g a part turned over at its end and provided with an opening through which link 52 passes.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment. or otherwise than by the'terms of the appended claims.

I claim:

1. A brake comprising in combination. a cylindrical brake drum, a plurality of brake shoes arranged end to end outside of the drum. and means to anchor one of said shoes between the ends oi the adjacent shoe.

2. A brake comprising, in combination. a cylindrical brake drum. a plurality of brake shoes arranged end to end outside of the drum. and means to anchor two of said shoes each between the ends of the other.

3. A brake comprising, in combination, a cylindrical brake drum, a plurality of brake shoes arranged end to end outside of the drum, the shoes having anchoring arms at their adjacent ends out of alinement with and projecting past each other and each projecting past the end of the friction face of 108 the other, and torque-taking means engaged by said arms.

4. A brake comprising, cylindrical brake drum, a shoes in, combination, a plurality of brake drum, one of the shoes having spaced anchoring arms at its end straddling the end of and projecting: past the end oi the friction face of the adjacent shoe, and torque-taking means engraved by l 5. A brahe comprising, in combination, a cylindricai brake drum, and a plurality oi brake shoes arranged end to end and sur rounding the outside of the drum, one of the shoes being; chauncl-shaped at lee-st at its end and the ilCijLU ntshoe having jecting into the ch annel-sha 'ier l end and past the end of the fr =tion face of the chann l shaped shoe.

.6. A brake comprising, in combination, a

cylindrical brake drum, and a plurality of brake shoes arranged end to end and sprroundingthe outside oi the drum, one oi tl c shoes being T-shaped throughmit most 01"? i length and channei-sha-ped at its end and adjacent shoe havinga part projecting; int the channel-shaped end.

' 7. A brake comprising, in combination, a cylindrical brake drum, and a plurality of brake shoes arranged end to end and surrounding the outside of the drum, one of the shoes being channel-shaped at least at its endandthe adjacent shoe having a part projecting into the channchshaped end, past the end of the friction face ottlthe channelshaped shoe, to overlap the two shoes, together with anchoring means ed by the overlapping ends of the shoes.

'8. A brake comprising, in combination, a drum, a pair of shoes anchored at adjacent ends, athird shoe connected to the nnan chored end of one of the pair of shoes, the three shoes being arranged .end to end outside of and surrounding the drum, and means for contracting the three shoes upon the drum.

9. A brake comprising, in combination, a drum, a pair of shoes anchored at adjacent ends, a third shoe connected to the unanchored end of one of the pair of shoes, the three shoes being arranged end to end outside of and surrounding the drum, means for contracting the three shoes upon the drum, and means yieldingly urging the connected ends of the third shoe and said one of the pair of shoes away from the drum.

10. A. brake comprising, in combination, a drum, a pair of shoes anchored at adja' cent ends, a third shoe connected to the unanchored end of one of the pair of shoes, the three shoes "being arranged end to end outside oil? and surrounding the drum, means for contra ting therithree shoes upon the drum, and means .yie'ldingly urging the conccted ends of the third shoe and said one of the pair of shoes away from the drum and yieldingly urging apart the free ends of the third shoe and the-other ot the pair of shoes.

11. A brake comprising. in combination, a d1. in, a sriport extending outside the circitrnference of the drum, a plu 'ality of brake shoes arranged end to end about the outside of the drum, and means for anchoring one end one of the shoes on said support between. the ends of the adjacent shoe.

12. A hralre comprising, in combination, a drum, :1 support extending outside the circum'lierence of the drum, a plurality of brai-ze shoes arranged end to end about the outside of the drum, and an anchor for one end of one of the shoes passing through a ivcly large opening in the adjacent shoe Hecn its ends and mounted on the supi A brake comprising, in combination a drum. a plurality of shoes arranged end to end outside of and surrounding the drum, anchoring means for the shoes, means for contracting the shoes upon the drum, and means for yieldingl urging the adjacent ends of two of the shoes away from the drum, the three said means being spaced approximately 120 apart.

14-. A brake comprising, in combination, a. drum, a pair of connected shoes arranged end to end outside of the drum, an anchor at the unconnected end of one of the shoes, contracting means at theunconnected end of the other shoe, and a spring, arranged to hold the anchored shoe away from the drum until the unanchored shoe moves with the drum and overcomes the spring.

15. A brake comprising, in combination, a drum, a pair of connected .shoes arranged end to end outside of the drum, an anchor at the unconnected end of one of the shoes, contracting means at the unconnected end of the other shoe, and a spring arranged to urge the connected ends of the shoes away from the drum.

signed my name.

ROY S. SANFORD. 

